Re: [Tinycc-devel] [PATCH] v2, preprocess all files from a command line with a -E switch

[Sergey Korshunoff]

pp-many-files, v2
Don't drop a preprocessor defines when tcc going to preprocess a next
file in the same pass like "tcc -E one.c two.c three.c -o combined.i"
This will allow to speed up a compilation process by using a commamd like
        tcc -E *.c | tcc -o program.exe -xc -

Initialization from tcc_preprocess() is moved to tcc_add_file_internal().
Call to free_defines(define_start) in tcc_preprocess()  is removed in assumption
that free_defines(NULL) in  tcc_cleanup() will free all defines.


2015-01-04 1:46 GMT+03:00, Thomas Preud'homme <address@hidden>:
> Le samedi 27 décembre 2014, 16:19:04 Sergey Korshunoff a écrit :
>> Don't drop a preprocessor defines when tcc going to preprocess a next
>> file in the same pass like
>>         tcc -E one.c two.c three.c -o combined.i
>>
>> Currently tcc don't handle such case. The new behavior is better then
>> the current one. After a patch it is possible to compile combined.i
>> in case:
>>
>> * include files are properly protected by
>>         #ifndef MY_INCLUDE_H
>>         #define MY_INCLUDE_H
>>           extern void func();
>>         #endif
>> * there is no incompatible declarations for the same name in *.c
>>
>> An archive for a test purpose is included
>
> Sorry but I'm not sure I like this functionality. When gcc compiles several
> .c
> files they are compiled independently: macro are not kept accross files.
> Doing
> this only for -E flag would make it not very consistent. Also I don't like
> the
> shape of the patch: initialization of the preprocessing should be split out
> of
> the function but anyway that is not worth discussing further given previous
>
> point.
>
> Best regards,
>
> Thomas
>